Our Pro Series hoods are manufactured with a durable double wall construction. Standard features include a chain and sprocket or stainless steel cable sash system, louvered by-pass panel, stainless steel duct collar and lower airfoil. All Pro Series hoods come in bench, extra tall bench, walk-in, and ADA heights, with several sash and liner options. Designs are available for HOPEC, perchloric acid, radioisotope, demonstration, or fully accessible (ADA) applications. All hoods can be configured for either variable air volume (VAV) or constant air volume (CAV) systems.